What Does Water Heater Service Cost?
Water heater costs range from $150 for a minor repair to $5,500 for a gas tankless conversion. The right service depends on what failed and how old the unit is.
Common Repairs: $150 to $600
Thermostat replacement on a tank water heater: $150 to $300. Heating element replacement (electric): $200 to $400. Anode rod replacement (extends tank life): $250 to $300. Pressure relief valve replacement: $100 to $250. Gas valve replacement: $300 to $600. Pilot assembly replacement: $150 to $300. These are the most common water heater service calls and represent repairs that make sense on a unit under 8 to 10 years old in otherwise good condition. (For more on this, see What Affects Water Heater Cost?.)
New Tank Water Heater Installation: $1,100 to $3,400
A standard 40 to 50-gallon gas or electric tank water heater installed in a home with existing connections runs $1,100 to $3,400 total — unit ($400 to $900 retail) plus installation labor and connection. Gas installation is slightly more expensive than electric (gas line connection, venting). Larger tanks (75 to 80 gallon) and units requiring new venting, electrical upgrades, or significant plumbing modifications are at the higher end. Most standard replacements complete in 2 to 4 hours. (For more on this, see Hidden Costs of Water Heater Replacement.)
New Gas Tankless Water Heater: $3,500 to $5,500
Tankless (on-demand) water heaters cost significantly more than tank units. Gas tankless: $3,500 to $5,500 installed, including gas line upsizing (tankless units require a larger gas supply than tank units), venting modifications, and the unit itself. Electric tankless: $1,500 to $3,000, including significant electrical upgrades (200-amp panel required in most cases; dedicated large-amperage circuits). The higher upfront cost recovers through energy savings (tankless heats water only when needed, eliminating standby heat loss) over 10 to 15 years. (For more on this, see Tank vs. Tankless Water Heater: Which Should You Choose?.) The Department of Energy compares storage, tankless, and heat pump water heaters and explains how to size a replacement.
Water Heater Service Cost at a Glance
| Cost Factor | Typical Range | Notes |
|---|---|---|
| Common repair (thermostat, element, valve) | $150 to $600 | — depends on the part and heater type |
| New tank water heater installed | $1,100 to $3,400 | — a 40 to 50 gallon electric or atmospheric gas tank sits low; a power-vent gas model reaches the top |
| New tankless water heater installed | $3,500 to $5,500 | — gas whole-home conversion, including the gas-line upsize, dedicated venting, and often an electrical run |
| Overall range | $150 to $5,500 | , averaging $1,100 for a 40 to 50 gallon tank replacement, the most common job |
Cost figures on this page were checked against published pricing on September 2, 2026. How we source cost data.
Planning Your Project Budget
The cost ranges in this article are based on industry data and are intended as planning benchmarks, not fixed prices. The actual cost for your project depends on your specific home, your local labor market, the current price of materials, and the scope the contractor confirms after a site inspection.
Always get at least two written quotes on equivalent defined scope before committing to any home services project. Wide price variation between quotes usually reflects differences in material quality, scope completeness (what is included and what is not), or contractor overhead and experience level rather than simple price competition.
Use the cost data in this article to ask better questions during the quoting process: What material is included? What does that per-square-foot or per-linear-foot rate include and exclude? Are permits, cleanup, and disposal included? What is the warranty on labor? These questions turn a quote into a comparable basis for decision-making.
Working With a Contractor on This Project
Getting the right outcome on any home services project starts before the work begins. A few consistent practices make the difference between a smooth project and a frustrating one.
Get at least two or three quotes. A single quote gives you no basis for comparison. Two or three quotes reveal the market rate for the work, expose scope differences between bidders, and let you assess contractor communication quality before any commitment is made. The lowest bid is not automatically the best value if the scope is thin or the materials are underspecified.
Ask for licenses and insurance before work starts. Verify current general liability insurance and, for any work involving workers on your property, workers compensation coverage. Licensing requirements vary by state and trade; confirm the specific requirements in your jurisdiction. A licensed contractor who carries appropriate insurance protects both parties if something goes wrong during the project.
Get the scope in writing. A written proposal that specifies materials, labor scope, timeline, what is included (permits, cleanup, disposal), and warranty terms is the foundation of a professional engagement. Verbal agreements on any of these points invite misunderstanding. For any project over $500, written scope is non-negotiable.
Clarify the payment schedule upfront. A reasonable payment schedule ties major payments to project milestones: a deposit at signing, a payment at material delivery or project start, and a final payment at completion after a walkthrough confirms satisfaction. A contractor who requires full payment upfront before work begins is a red flag in any trade.
